Title:
【発明の名称】脱ロウ油からの低温溶剤の膜分離を利用した潤滑油の脱ロウ
Document Type and Number:
Japanese Patent JPH08508761
Kind Code:
A
Abstract:
A process for solvent dewaxing a waxy oil feed to produce a lubricating oil by contacting a warm waxy oil feed in counter-current with a cold oil/solvent filtrate stream through a selectively permeable membrane to transfer cold solvent through the membrane to the feed and simultaneously cool the feed, dilute it with solvent and separate solvent from the cold oil/solvent filtrate stream. The cooled, diluted feed stream is then further cooled to precipitate the wax to form an oil/solvent/wax mixture which is further diluted with cold solvent and filtered to remove wax. The cold oil/solvent filtrate stream is cycled to the selectively permeable membrane for the counter-current contact with the warm waxy oil feed and, after removal of a portion of the solvent over the membrane, is sent to an oil/solvent separation operation in which the solvent is removed from the dewaxed oil.
Inventors:
Gould, Ronald Michael
Application Number:
JP51936094A
Publication Date:
September 17, 1996
Filing Date:
April 21, 1994
Export Citation:
Assignee:
MOBIL OIL CORPORATION
International Classes:
B01D61/02; B01D61/24; C10G73/06; C10G73/10; C10G73/04; C10G73/12; C10G73/32; (IPC1-7): C10G73/04; C10G73/10; C10G73/12; C10G73/32
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)